Coupling structure



Jam 6, 1959 o. R. BR'INEY, JR., ETAL 2,367,031

COUPLING STRUCTURE Filed Oct. 22, 1956 S SR Y RJY E OYE N TE R NNN o El'a VRR T B T WB.W. A l M RS x a E 6 8 TM 6, 6/ TA O O 4. V 1 2 WQ Vl w. B

COUPLING STRUCTURE Ottis R. Briney, Jr., and James W. Briney, Pontiac,Mich., assignors to Briney Manufacturing Co. Pontiac, Mich., acorporation of Michigan Application Gctober 2.2, 1956, Serial No.617,368

12 Claims. (Cl. 29-105) 'The present invention relates to couplingstructure, and more particularly to the application of improved couplingstructure applicable to tools, and still more particularly, to acombined boring and turning tool.

In accordance with the present invention a tool adapted to be secured tothe end of a spindle is provided with means for boring the interiorsurface of a hole in a Work piece and at the same time, turning theouter surface, thus producing an accurately finished cylindrical :shellof accurately maintained wall thickness in a single operation.

It is an object of the present invention to provide a combined boringand turning tool providing for extremely small and accurate radialadjustment of the boring and turning blades independently of each other.

lt is a further object of the present invention to provide novel meansfor effecting radial adjustment of a turning tool.

It is a further object of the present invention to provvide couplingstructure adapted to permit accurate radial adjustment of elementsthereof in a manner which maintains the parts in accurate torquetransmitting relation without sacrilicing the accuracy of adjustment.

More specifically, it is a feature of the present invention to providefor radial adjustment of a turning tool by means which comprises asupport of circular crosssection, an annular bushing having interior andexterior surfaces of circular cross-section which are eccentric to eachother, and an annular tool holder having an opening of circularcross-section therein, together with means for effecting angularadjustment of the bushing to provide generally radial adjustment of thetool holder relative to the support.

Other objects and features of the invention will become apparent as thedescription proceeds, especially when taken in conjunction with theaccompanying drawings, wherein:

Figure l is an end view of the combined boring and turning tool.

Figure -2 is a side elevational View partly in section.

Figure 3 is a side elevational view 'with parts removed and theremaining parts in section.

The combined tool comprises a support body including a plate or flange11, and a forwardly projecting cylindrical post 12. The flange 11 isadapted to be bolted or otherwise secured to the end of a spindle bymeans such for example as the bolts indicated at 13. The support body 10is adapted to support a boring bar 14 having cutting blades 16 carriedthereby, and also to support an annular turning tool holder 18 adaptedto support the turning blades 20. Means are provided for supporting boththe turning and boring blades rigidly in positions of extremely accurateadjustment and to permit these blades to be moved into the positions ofaccurate adjustment in such a way that they are not subject todellection before a subsequent cutting operation. This is accomplishedby eliminating the necessity for separately clamping the holders vinadjusted positions.

" arent 2,867,031 Patented Jan. s, 1959 ICC Referring rst to the meansfor electing radial or substantial radial adjustment of the boringblades 16, this mechanism may be substantially as vdisclosed in BrineyPatent 2,558,815 granted July 3, 1951. For completeness, it is shownherein as comprising an eccentric sleeve or bushing indicated generallyat 22 having a generally cylindrical portion 24 the interior surface 26of which is slightly eccentric with respect to the exterior cylindricalsurface 28. The cylindrical portion of the bushing is received in anannular space defined by an internal cylindrical surface 30 formed inthe post 12 and the cylindrical surface 32 of the shank of the boringbar 14. Preloaded ball bearings indicated generally at 34 and 36, areprovided for supporting the eccentric bushing 22 for substantially freerotational adjustment without any clearance or backlash.

The bushing 22 includes a generally conical portion 38 the conicalexterior surface of which engages in centering relation on a conicalsurface 40 adjacent the end of the generally cylindrical post 12 ofthesupport body 10.

As best seen in Figure 2, the .exterior surface of the bushing may beprovidedwith graduations as indicated at 44, and an indicating pointer46 provided on the forward edge of the post 12 to provide an indicationof the adjustment of the boring bar.

At its inner end the shank of the boring bar is threaded as4 indicatedat 50 and has firmly secured thereto a nut 52. The nut is received in aradial enlargement 54 provided in the body 10 and is provided withlpockets 56 receiving compression springs 58. At one point the nut 52 isrecessed as indicated at 60 and receives a drivingjkey 62 which ispartly received in the radially outwardly extending recess 64 formed inthe body 10.

Springs 58 exert a force urging the boring bar tothe left, as seen inFigure 3, thus causing conical surfaces 66 thereon to engage conicalsurfaces 68 provided at the interior of the bushing. The springs are ofsutiicient strength to maintain theseconical surfaces in rm accuratelocating position. Torque is transmitted from the body 10 to the boringbar through the key 62.

Due to the provision of the preloaded bearings 34 and I 36 the eccentricbushing 22 may be readily adjusted and for this purpose its outerperipheral surface isprovided with recesses 70 for engagement by aSpanner wrench. This adjustment may be accomplished without requiringthe loosening of any clamping means, and the boring bar remainspositively ixed in adjusted position and is ready for cutting as soon asangular adjustment of the bushing is terminated. This is to becontrasted with constructions which require loosening of a part prior toadjustment, followed by tightening of vthe part in adjusted position.Invariably, such an operation results in movement of the part out ofadjusted position during the clamping or tightening operation.

Means including the support body 10 are provided for effectingcompletely independent adjustment of the turning or facing blades 20.This means, as best seen lin Figure 2, comprises an annular eccentricbushing surrounding a cylindrical guide surface 76 provided on theforward cylindrical extension or post 12 of the support body 10.Alternatively, if desired, a separate annular shell may be provided overthe post 12 to constitute a. race for ball bearings subsequently to bedescribed. Located radially outwardly of the eccentric bushing 7S is theturning tool holder 18 which comprises an annular member having anintegral post- 77 thereon supporting the turning or facing blade 20. Thetool holder 18 is subsequently to be described. "The eccentric bushing75 is provided with a' generally annular ange portion 80 having aninternal cylindrical bearing surface 82 and an external vcylindricalbearing surface '84, these surfaces being eccentric by a few thousandthsof an inch. Disposed in the annular space between the cylindricalsurfaces`76 and 82 is a preloadedball bearingindicatedgenerally at S6,the balls being carried 'by a cylindrical retainer and dimensioned to bepreloaded'when inserted. In `like manner, a 'ball bearing indicated'generally `at 88 is located inthe annular space betweenithe "surfaces'79 and 84, the balls being Acarried by a "cylindrical retainer and'dimensioned to be preloaded in assembly. The arrangement permitsangular adjustment ofthe eccentric bushing 75 in rotation whileAproviding continuous Atransaxial supportfor the holder '18.

The Aholder 18 is jprovided with ya radially extending cylindrical'opening 99 in vwhich is received a slidable friction Ymember 492 havinga-pin A94received in an annular lgroove 96 formed in the outer surfaceof athickened end portion 98 -of the lbushing 75. The friction member 92engages the peripheral surface 'of 'the bushing 75 and tends V'toprevent accidental rotation thereof. The member 92 4is -provided with ahead ltiflmovable Vinian enlargement 102 of 'the opening 90-and isengaged by a compressionv spring 1'04`seated against an adjustablespring abutment A'106.- The arrangement provides for adjustment of vthefriction between the slide vmember 92 and the eccentric bushing 75,butin'any case the pin 94 preventsaxial-movement of the bushing.

The annular holder 18 is vconnected to the plate -or flange 11 of thesupport body by headed vscrews 110 threaded in `tapped Yrecesses 112 inthe 'forward `face of the plate 11, Athe Iheads of the screws lbeingreceived in enlarged :openings 1114 1in the holder and -being engaged bycompression springs -116 which Vseat'against shoulders at 11.8. Thearrangement is such that `the annular vholder 118fis vpressed firmlyagainst the accurately `finished planar forward face of theplate 11 andthe -rear surface `of the :holder L18 will be accurately finished toprovide for smooth, vaccurate adjustment. The screw 110 Avextendsthroughan opening 120 in theholder, the opening being enlarged to,provide for 'limited adjustment thereof.

-Means Aindependent of the structure so far Adescribed are provided fortransmitting torque from the Asupport body to the holder `18 Yand thismeans comprises an elongated recess 122 formed in the rear surface ofthe annular 'holder I`18 and receivingone end of va drive pin 123, theother end-of the .pin .being pressed -intoanopening 124 at the forwardface .of `the `plate 1v1. The Arecess 122 is elongated in a generallyradial direction to provide for the adjustmentofdhe'holder 18 resultingyfrom turningof the bushing 7 S.

From the -foregoingiitwill be observed fthat means are provided forsupporting both the -boring -tool and the turning tool rigidly and foreffecting 'positive kdriving of these tools in amachining operation. Atythesame time, extremely fine adjustments may beimade of the boring andturning tools -radially of the axis of rotation. This extremely fine andaccurate .adjustment is laccomplished without `the .necessity .ofloosening any .clamping felernents andthe tools are ready for cuttingLupon ymovement 4into adjusted position without the necessity forretightening of yclamping elements 'with the Aconcomitant Ydislocationof thetoolsfrom the adjusted'position.

It will be observed that the tools 'are designed so k"that the loadsimposed thereon lduringthe'cutting operationare transmitted to rigidsupporting surfaces. At the same time, the construction is such that theadjustment may be accomplished directly and quickly by rotation of .theadjusting bushings 22 and 75.

The drawings and the -foregoing specification constitute a descriptionof the .improved coupling structure in such full, clear, concise andexact terms .as to enable any .person Iskilled in .the art to practice.the invention, the scope of which is .indicated -hy 4the appendedclaims.

What we claim as ,our invention is:

1. Coupling structure comprising a body comprising a cylindricalpost anda radial flange at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushing.and .bearing against said planar surface, anti-friction means betweensaid cylindrical post and said bushing and between said bushing and saidannularmember, key means between said body and vmember, and .meanscarried by said body pressing said member firmly against said planarsurface.

2. Coupling structure comprising a rotary body comprising a cylindricalpost and a radial lian-ge at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, anti-friction means betweensaid cylindrical post and said bushing and between said bushing and saidannularvmember, driving key means between said body and member, andmeans carried by said body pressing said member firmly against saidplanar surface.

3. Coupling structure comprising a rotary body comprising a cylindricalpost and a radial flange at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, preloaded ball bearinganti-friction means between said'cylindrical post and said bushing andbetween said bushing and said annular member, driving key means betweensaid flange and member, and means carried by .said body .pressing saidmember `firmly against said planar surface.

y4. .Coupling structure comprising a body comprising a cylindrical postand a radial Vflange at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, anti-friction means betweensaid cylindrical post and said bushing and between said bushing andsaidannular member, key means between said body and member, and resilientmeans carried by said body pressing said member firmly against saidplanar surface.

5. Coupling structure comprising a body comprising a cylindrical postand a radial flange at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against vsaid lplanar surface, preloaded ball bearinganti-,friction ,means between said cylindrical Vpost .and .said bushingand between said bushing and said `annular member, key means betweensaid body and member, and resilient means carried by said flangepressing said `member firmly against said planar surface.

6. Coupling structure comprising a body comprising a cylindrical postand a radial ange at one end ofsaid post, said flange having an`accurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric .bushing surrounding said post,an annular member having a cylindrical opening :surrounding said bushingand bearing against said planar surface, anti-friction means betweensaid cylindrical post and said bushing and between said bushing and saidannular member, a ydrive pin `carried by said flange, said flange havingan 'elongated slot generally Iradial 'of said body receiving said pinand providing for generally radial adjustment of said body by angularadjustment of said bushing while maintaining driving connection betweensaid body and member, and means carried by said body pressing saidmember rrnly against said planar surface.

7. Coupling structure comprising a body comprising a cylindrical postand a radial ilange at one end of said post, said ilange having anaccurately iinished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, anti-friction means betweensaid cylindrical post and said bushing and between said bushing and saidannular member, key means between said body and member, headed pinsextending forwardly from said flange, enlarged openings through saidmember receiving said pins and having spring seats adjacent the ends ofsaid opening adjacent said ange, and compression springs surroundingsaid pins and compressed between the heads of said pins and said springseats, said openings having lateral clearance with respect to said pins.

8. Coupling structure comprising a body comprising a cylindrical postand a radial flange at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, pre-loaded ball bearingsbetween said cylindrical post and said bushing and between said bushingand said lannular member, key means between said body and member, andmeans carried by said body pressing said member rmly against said planarsurface.

9. Coupling structure comprising a body comprising a cylindrical postand a radial ange at one end of said post, 'said ange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, pre-loaded ball bearingsbetween said cylindrical post and said bushing and between said bushingand said annular member, a drive pin carried by said flange, said flangehaving an elongated slot generally radial of said body receiving saidpin and providing for generally radial adjustment of said body byangular adjustment of said bushing while maintaining driving connectionbetween said body and member, and means carried by said body pressingsaid member rmly against said planar surface.

10. Coupling structure comprising a body comprising a cylindrical postand a radial ange at one end of said post, said ange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an' annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, preloaded ball bearings betweensaid cylindrical post and said bushing and between said bushing and saidannular member, key means between said body and member, headed pinsextending forwardly from said ilange, enlarged openings through saidmember receiving said pins and having spring seats adjacent the ends ofsaid opening adjacent said flange, and compression springs surroundingsaid pins and compressed between the heads of said pins and said springseats, said openings having lateral clearance with respect to said pins.

11. Coupling structure comprising a body comprising a cylindrical postand a radial ange at one end of said post, said flange having anaccurately finished planar surface perpendicular to the axis of saidpost, an angularly adjustable eccentric bushing surrounding said post,an annular member having a cylindrical opening surrounding said bushingand bearing against said planar surface, anti-friction means betweensaid cylindrical post and said bushing and between said bushing and saidannular member, key means between said body and member, means carried bysaid body pressing said member firmly against said planar surface, saidannular member having a generally radially extending openingtherethrough in line with said bushing, a friction element movable insaid radially extending opening, and adjustable spring means urging saidfriction member into engagement with the outer surface of said bushing.

12. Coupling structure comprising a body comprising a cylindrical postand a radial ilange at one end of said post, said flange having anaccurately nished planar surface perpendicular to the axis of said post,an angularly adjustable eccentric bushing surrounding said post, anannular member having a cylindrical opening surrounding said bushing andbearing against said planar surface, anti-friction means between saidbushing and said annular member, key means between said body and member,means carried by said body pressing said member firmly against saidplanar surface, said bushing having at its; A

outer surface an annular groove, said annular member having a radiallyextending opening in alignment with said annular groove, a frictionmember movable in said opening including a finger receivable in saidgroove to prevent relative axial movement between said annular memberand said bushing, and resilient means effective to urge said frictionmember into frictional engagement with said bushing.

Hassig Aug. 19, 1941 Briney July 3, 1951

